CVE-2025-21355

HIGH
2025-02-19 [email protected]
Microsoft Authentication Bypass Bing
8.6
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 28, 2026 - 18:27 vuln.today
Patch Released
Mar 28, 2026 - 18:27 nvd
Patch available
CVE Published
Feb 19, 2025 - 23:15 nvd
HIGH 8.6

DescriptionNVD

Missing Authentication for Critical Function in Microsoft Bing allows an unauthorized attacker to execute code over a network

AnalysisAI

Missing Authentication for Critical Function in Microsoft Bing allows an unauthorized attacker to execute code over a network. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

Technical ContextAI

This vulnerability is classified as Missing Authentication for Critical Function (CWE-306), which allows attackers to access critical functionality without authentication. Missing Authentication for Critical Function in Microsoft Bing allows an unauthorized attacker to execute code over a network Affected products include: Microsoft Bing.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Require authentication for all sensitive operations, implement defense in depth.

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CVE-2025-21355 vulnerability details – vuln.today
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